#W5_2 给定一个整型列表，请实现从其中找出2个数的和为某一个指定的值？
def find_partner(num_list:str, sm :int = 11 ):
    num_set = set(num_list)
    ret_set = set()
    for num in num_set:
        pt_num = sm - num 
        if pt_num in num_set and num <= pt_num:
            print('{}和{}的和是{}'.format(num,pt_num,sm))
